X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=memxor.S;h=a32058bfc4c3c93d22abd82e23f83ae30d4e56e9;hb=02ac3b653f3a11f284cc1a0cb0e983575f2f431b;hp=b89fccd3a3f392f3b5bac425f8addee57d2979b6;hpb=71a4c5f0a397c8a34211ca269356198a0e91da17;p=avr-crypto-lib.git

diff --git a/memxor.S b/memxor.S
index b89fccd..a32058b 100644
--- a/memxor.S
+++ b/memxor.S
@@ -1,6 +1,6 @@
 /* memxor.S */
 /*
-    This file is part of the Crypto-avr-lib/microcrypt-lib.
+    This file is part of the AVR-Crypto-Lib.
     Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
 
     This program is free software: you can redistribute it and/or modify
@@ -17,15 +17,15 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-/* 
+/*
  * File:        memxor.S
  * Author:      Daniel Otte
  * Date:        2008-08-07
  * License:     GPLv3 or later
  * Description: memxor, XORing one block into another
- * 
+ *
  */
- 
+
 /*
  * void memxor(void* dest, const void* src, uint16_t n);
  */
@@ -39,9 +39,7 @@ memxor:
 	movw r30, r24
 	movw r26, r22
 	movw r24, r20
-	tst r24
-	brne 1f
-	tst r25
+	adiw r24, 0
 	breq 2f
 1:
 	ld r20, X+
@@ -52,17 +50,17 @@ memxor:
 	brne 1b
 2:
 	ret
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